first version

cmd/status/status.go

@@ -0,0 +1,66 @@
+package status
+
+import (
+	"backlight-control/internal/backlight"
+	"encoding/json"
+	"fmt"
+
+	"github.com/spf13/cobra"
+)
+
+func NewCommand(parent *cobra.Command) {
+	cmd := &cobra.Command{
+		Use:     "status",
+		Aliases: []string{"st"},
+		RunE:    run,
+		Short:   "get backlight status (current,max,percentage)",
+	}
+
+	parent.AddCommand(cmd)
+}
+
+type backlightStatus struct {
+	Current    int     `json:"current"`
+	Max        int     `json:"max"`
+	Percentage float32 `json:"percentage"`
+}
+
+func run(cmd *cobra.Command, args []string) (err error) {
+	dirPath, err := cmd.Flags().GetString("path")
+	if err != nil {
+		return fmt.Errorf("get directory path from flags fail: (%w)", err)
+	}
+
+	lightInstance, err := backlight.NewInstance(dirPath)
+	if err != nil {
+		return fmt.Errorf("create backlight instance fail: %w", err)
+	}
+
+	cur, err := lightInstance.GetCurrent()
+	if err != nil {
+		return fmt.Errorf("get current brightness fail: %w", err)
+	}
+	max, err := lightInstance.GetMax()
+	if err != nil {
+		return fmt.Errorf("get max brightness fail: %w", err)
+	}
+
+	status := backlightStatus{
+		Current: cur,
+		Max:     max,
+	}
+
+	// cale percentage
+	f := float32(int(float32(cur)/float32(max)*10000)) / 100
+
+	status.Percentage = f
+
+	b, err := json.Marshal(status)
+	if err != nil {
+		return err
+	}
+
+	fmt.Println(string(b))
+
+	return
+}